Which one of the following options is the correct dental term used to describe the surface of a tooth furthest away from the centre line?

The term that describes the surface of a tooth that is furthest away from the center line is known as "distal." In dental terminology, this refers specifically to the surface of a tooth that is situated towards the back of the mouth, away from the midline or center of the dental arch. Understanding these positional terms is crucial in dentistry, as they help dental professionals communicate effectively about tooth location and orientation during examinations, procedures, and treatment planning.

The term "buccal" refers to the surface of the tooth that is closest to the cheeks. "Labial" pertains to the surface of the anterior teeth that is closest to the lips. "Mesial," on the other hand, describes the tooth surface that is closest to the center line of the dental arch. Therefore, "distal" is the appropriate choice for identifying the surface of the tooth farthest from the midline.